Stop motion for twisting machines



Nmr. M, H939. E. R. DUNCKLEE El AL 2.179.498

STOP MOTION FOR TWISTING MACPIINES Filed Dec. 20, 1937 INVENTOR$ E/F.Danie/nee.- 8 CM JHcLaaN BY 7 fl%zy/ ATTORNEY Patented Nov. 14, 1939UNITED STATES STOP MOTION FOR TWISTING MACHINES Elmer R. Duncklee,Mystic, Conn., and Cecil M.

Sheldon, Westerly, R. 1., assignors to The Al;- wood Machine Company,Stonington, Conn., a corporation of New Jersey Application December 20,1937, Serial No. 180,720

4 Claims.

This invention relates to textile machines and particularly to means topromptly stop operation of one of the operating units of the machinewhen a thread breaks.

The stop mechanism forming the present invention is applicable towinding and twisting machines and is shown, in the embodiment selectedfor illustration, in a doubling and twisting machine of standardconstruction and design.

An object of the invention is to provide improved drop wire meansoperative to stop the winding and twisting operation at one of thespindles or units of the machine when one of the individual threadsbreaks prior to being twisted with the other threads, or, when thecompletely doubled and twisted thread breaks.

One feature of importance and which enables the above object to beaccomplished is that in addition to the usual individual drop wires forthe threads being twisted into a single strand there is provided anotherdrop wire engaging the complete or composite thread after the strandsthereof have been at least partially doubled and twisted together.

And another object of the invention is to provide a drop wire engagingand adapted to be actuated by breaking of the composite thread actuationof this latter drop wire serving to operate the same stop mechanism asthe actuation of any drop wire when any of the individual threadsforming the composite thread may break.

And finally, it is an object of the present invention to form the dropwire for the complete or composite thread in the form of a pivotallymounted wire having a thread guide at one free end and at its oppositeend is interlooped with a bar or rod extending substantialy verticallyand engaging a member of the stop motion, the pivotal bearing for thewire being preferably mounted on the housing for the feed mechanism.

With the above and other objects in view the invention includes thefeatures of construction and operation set forth in the followingspecification and illustrated in the accompanying drawing.

In the accompanying drawing annexed hereto and forming a part of thisspecification, we have shown the invention embodied in a doubling andtwisting machine for silk, rayon or other fine fibrous material but itwill be understood that the invention can be otherwise embodied and thatthe drawing is not to be construed as defining or limiting the scope ofthe invention, the claims appended to this specification being reliedupon for that purpose.

In the drawing:

Fig. 1 is a side elevation of a unit mechanism bf a doubling andtwisting machine provided with the present invention.

Fig. 2 is a front elevation of some of the parts shown in Fig. 1, and

Fig. 3 is a detailed isometric view of the secondary drop wire and itsconnecting member to the stop mechanism.

In the above mentioned drawing there has been shown but one embodimentof the inven-- tion which is now deemed preferable, but it is to beunderstood that changes and modifications may be made within the scopeof the appended claims without departing from the spirit of theinvention.

Briefly, and in its preferred aspect, the invention may include thefollowing principal parts: delivery spools, thread guiding means, feedmechanism, usual or conventional parts of a twisting or other textilemachine, individual drop wires for eachthread being operated on engagingthe threads before they reach the feeding means, a separately mounteddrop wire engaging and being heldin operative position by the tension ofthe thread after passing the feeding means, tripping means operated byfalling of the secondary drop wire or one of the drop wires for theindividual strands when either an individual thread or the com positethread breaks, and stopping means operated by these tripping means tostop operation of the unit mechanism.

Referring more in particular to the drawing we have shown an embodimentof the invention incorporated in a standard doubling and twistingmachine for silk, rayon, etc. Theads from a plurality of spools I passdown over suitable guide rolls H and through eye l2 to a feed wheel l3suitably driven at a predetermined speed by suitable driving meansforming no part of the present inventio'n. Between the guide rollers IIare mounted the usual drop wires 9 there being one of these wires foreach of the strands, and each wire is provided with an eye or loop atits outer end through which one of the strands passes. The feed wheel i3is supported for rotation upon a vertically movable rod i4 and a drivinggear l5 for the feed wheel [3 meshes with a gear I 6 on a main drivingshaft ll. As these latter parts form no part of the present inventionthey will not be further described.

After passing around the feed wheel l3 the strands being twisted passthrough a loop or eye IE on a pivotally mounted wire I 9 from which theypass to the ring traveller 2i] and on to the take up bobbin 2! in theusual manner.

The vertically movable rod i4 is held in its lower or operative positionby a latch 22 of standard construction and upon releasing ordisengagement of this latch the rod l4 moves upward and disengages geari5 from its driving gear It.

To operate this latch movement of any one of and take up spools formingthe the drop wires 9 to its position indicated by dot and dash linesmoves an arm 24 on the drop wire to a position to cause oscillation ofpivotally mounted lever 25 supported at an intermediate point on thelower end of latch member 22. In its oscillated position'the rear end ofthe lever 25 intercepts the path of movement of a constantly oscillatedarm 28 so that the latch member 22 is forced laterally to itsdisengaging posi- The operation of these individual drop wires 9, one ofwhich is provided for each strand being twisted, is well known. Thesedrop wires do not operate however in the event of. breakage oocurringbetween the feed wheel l3 and the take .the combined or twisted strandsoccurs the wire i9 is oscillated to the position shown in dot and dashlines, this movement being due to the wire I9 having its rear endweighted by a vertical baror wire 29 flexibly attached thereto.

Preferably and as shown in Figs. land 3 the lower end of rod 29 and therear end of wire l9 are formed into loops so that theseends may beloosely inter-engaged and retained in proper relative position. By meansof this looped connection and the weight of the rod 29 this rod drops ashort distance when the wire l9 oscillates upon breakage of the combinedthreads. Movement downward of rod 29 may be facilitated by a smallsupplementary weight 30 which may be secured to the rod. Also guidingmeans for this rod may be provided in the form of a short arm 3|outstanding from the vertical rod l4 and having a suitable openingadjacent its free end through which the rod 29 may extend at anintermediate point.

The upper end of the rod 29 is bent substantially at right angles as at32. This upper bent end 32 of rod 29 engages over pivotallymountedmember 25 so that when rod 29 drops the member 25 will beoscillated to actuate the trip mechanism 22 and allow the rod M to liftthe feed mechanism to an inoperative position.

As shown most clearly in Fig. 3 the wire 19 may be formed from a singlepiece, the intermediate portion being circularly bent or coiled to forma transverse opening by means of which the stud 21 centrally engages thewire. The lower end of rod 29 is coiled and interlooped with the coiledrear end of wire i9 so that the contiguous ends of the wire l9 and rod29 may be joined for free pivotal movement relative to each other.Whenever a thread breaks either before or after passing the feed wheell3 the member 25 may be oscillated to promptly release the latch 22 andstop operation at that unit. Also when the combined strands or compositethread breaks below the feed wheel l3 and the drop wire l9 operates thedrop wires 9 for the individual strands remain in place and the threadsabove the feed wheel are not in any way interfered with.

We claim as our invention 1. A stop motion for textile doubling andtwisting machines comprising in combination, threadfeeding means, ahousing therefor, a latch, member for retaining said feed means inoperative position, drop wires engaging individual threads beingoperated on, trip mechanism actuated by downward movement of a drop wireto render said feed means inoperative, a drop wire pivotally supportedon said housing engaged by the combined threads after passing the feedmeans, a vertically disposed rod connected pivotally to said lastmentioned drop wire, and means connecting said last mentioned drop wireto the trip mechanism actuated by said first mentioned drop wires,whereby a break in the combined threads will render said feed meansinoperative.

2. A stop motion for textile doubling and twisting machines comprisingin combination, thread feeding means, a housing therefor, a latch memberfor retaining said feed means in operative position, drop wires engagingindividual threads being operated on, trip mechanism actuated bymovement of. a drop wire to render said feed means inoperative, a dropwire pivotally supported on said housing engaged by the combined threadsafter passing the feed means, a vertically disposed weighted rod havingits lower end connected to the rear end of said last mentioned drop wireand actuating said last mentioned drop wire when the combined threadsbreak, said means connecting said last mentioned drop wire to the tripmechanism actuated by said first mentioned drop wires, whereby a breakin the combinedthreads will render said feed means inoperative. v

3. A stop mechanism for textile doubling and twisting machinescomprising in combination, a feed mechanism for advancing a plurality ofthreads from individual spools to a single take up spool, a housingtherefor, individual drop wires engaging the separate threads betweensaid spools and said feed mechanism, a constantly actuated trippingmember, means operated by said .member to disengage said feed mechanismwhen a thread breaks and a drop wire fails, a drop 4 wire pivotallysupported on said housing engaging the doubled and twisted threads afterpassing said feed mechanism, and a weighted rod pivotally engaging saidlast mentioned drop wire and actuating said last mentioned drop wirewhen said combined threads break, said rod being connected to said feeddisengaging means,

whereby when said combined threads break the feeding mechanism will berendered inoperative.

4. A stop motion for textile doubling and twisting machines comprisingin combination, thread feeding means, a housing therefor, a latch memberfor retaining said feed means in operative position, separate drop wiresengaging indivldual threads being operated on, trip mechanism actuatedby downward movement of any of said drop wires to render said feed meansinoperative, a drop wire pivotally supported on'

